>From Sept. 24, 2014 (TO, BUT NOT INCLUDING) Sept. 16, 2021
is 2,449 days as you indicate, but when we add the 'single day'
of Sept. 16, 2021 there are exacrly a total of 2,550 days
INCLUSIVE. Remember, all Hebrew days begin at sunset the evening
before the day is 'fully come' after sunrise the following
morning.